PASCO ME-6992B Advanced Structures Set - Manual (Page 9)

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M o d e l N o . M E - 6 9 9 2 B A d d i n g L o a d C e l l s
5 012-12719B
Nut and Bolt for PAStrack: The square nut and bolt can be used with a flat connector to
fasten a bridge or other structure to the PASCO PAStrack (see the PASCO catalog or
web site at www.pasco.com for information about PAStrack equipment.)
Axles, Pulleys, Spacers, Collets, and Drive Wheels
Axles: There are two each of three different lengths: 10.4 cm (4.1 in), 21.3
cm (8.4 in), and 26.6 cm (10.5 in). Each axle is 0.635 cm (0.250 in) in
diameter.
Pulleys: There are twelve pulleys, each 3.175 cm (1.250 in) in diameter
and 0.558 cm (0.220 in) wide. To make a wheel, put one of the “O” rings
into the pulley’s groove.
Spacers: There are twelve spacers, each 0.635 cm (0.250 in) inside diame-
ter, 1.25 cm (0.50 in) outside diameter, and 0.635 cm (0.250 in) wide.Col-
lets: There are twenty-four collets that can be used with screws (6-32) to
hold pulleys and spacers in place on an axle.
Drive Wheel with Tire: There are four drive wheels with tires. The drive
wheel can be attached to an axle using a thumbscrew. To attach the wheel firmly to the axle, line up a hole on the
axle with the thumbscrew hole on the wheel. If the rubber tire is removed, the wheel can be used as a large pul-
ley.
Force Platform Structure (ME-6988A)
The PASCO model ME-6988A Force Platform Structures Bracket includes two brackets and four thumbscrews.
The adapter bracket is designed to connect members of the PASCO Structures System to a PASCO Force Platform
(not included). The brackets can also serve as foundation plates for larger structure models.
(Please see the Force Platform Structures Bracket instruction sheet for more information.)
Adding Load Cells
To measure the compression and tension forces in
individual members, add load cells (e.g., PASCO
Model PS-2200) to any PASCO Structure. Replace a
beam with two shorter beams and a load cell.
#5 beam = load cell + two #3 beams
#4 beam = load cell + two #2 beams
#3 beam = load cell + two #1 beams
Use thumbscrews to attach two beams to a load cell as
shown in Figure 8.
When using load cells, assemble your structure with the screws loose. This will simplify the analysis by ensuring
that the members experience only tension and compression without moments.
See the instructions that came with the load cells for details about how to connect the load cells to an interface or
datalogger and collect data.
Figure 6: Nut and
Bolt for PAStrack
Figure 7: Axle items
Axle
O-Ring
Pulley
Spacer
Collet
Drive
Wheel
Figure 8: A load cell combined with two #2 beams is
the same length as a #4 beam